Tar-trap for hydraulic mains



v(No Model.)

o'. L. RGWLAND. f TAR TRAP FOR HYDRAULIC MAINS; No. 549,214.-

Patentgd Nov.if5, 1895.

UNITED STATESV Erica.

vPATENT TAR-TRARFOR HYDRAULIC MAINS.

SPECIFICATION forming part of Letters Patent No. 549,214, dated November 5, 1895.

Application filed .Tune 8, 1892. Serial No. 436,000. (No model.)

To aZZ whom, it may concern:

Be it known that I, CHARLES L. ROWLAND, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Tar-Traps for Hydraulic Mains for Gas-Works, of which improvements the following is a speciiication.

My invention more especially relates to tartraps or valves for hydraulic mains for gasworks of that class in which the discharge of the tarry liquid or sediment which accumulates in the hydraulic main is controlled by regulating the height of an overflow-pipe in the main or a chamber connected therewith.

The objects of my invention are to provide an organization in which the mouth of the overow pipe shall terminate Within the chamber and have its mouth as well as its entire bore and discharge end entirely unobstructed, and in which there shall be no rod or other connection extending from the pipe within the chamber to and through the top of the chamber, and to enable the operator readily to adjust the overflow-pipe by mechanism entirely outside of the chamber and connected with the overiiow-pipe below the chamber and above the discharge end of the pipe. To accomplish these ends, I introduce the overflowpipe, whose mouth is entirely unobstructed, into the bottom of the chamber through a suitable gland or packing and adjust it vertically, as desired, my mechanism attached to it outside of and below the chamber.

The details of construction are hereinafter described.

I am aware that various constructions have heretofore been proposed in which a vertically-adjustable overflow-pipe has been introduced through the bottom of aV chamber in the class of apparatus to which my inventionv specially relates, as well as in otherA classes of apparatus. I am also aware that in gaswashing apparatus it has been proposed to introduce through the bottom of a chamber a vertically-adjustable overflow-Siphon for maintaining auniform water-level in the chamber. In all such cases, however, the mouth of the overflow pipe or siphon has not been unobstructed, and the vertical adjustment has been accomplished by rods or connections extending from the mouth of the pipe or siphon up through the top of the chamber.v

In the class of apparatus to which my invention specially relates it is particularly desirable that the mouth of the overflow-pipe shall be unobstructed and that there shall be no parts extending upwardly from the pipe within the chamber, because such parts or any part constituting an obstruction to the mouth of the pipe become gradually loaded withan increasing accumulation of tarry or other heavy liquids or material that interferes with the proper operation of the apparatus or gradually decreases the effective area of discharge of the mouth of the overflow-pipe.

I am also aware that in decanting apparatuses a discharge pipe has been inserted throughthe bottom of the vessel and that its actual mouth or inlet end within the vessel has been unobstructed; but in all such cases,so far as I am aware,the discharge-pipe has been provided with'a faucet that obstructs its bore, and where the end of the pipe within the vessel has been vertically adjustable it has been manipulated by a rod attached to a spider at the lower end of the adjustable part of the pipe. rlhese constructions all introduce into the discharge-pipe obstructions that offer a seat for clogging matter and are open to the objections above pointed out quite as much as if the obstruction were located at the mouth of the pipe, as in the instances above referred to.

j The accompanying drawngs sihow so much only of my improved apparatus as is necessary to illustrate the subject-matter claimed.

Unless otherwise indicated the parts are of usual approved construction.

Figure 1 shows a side elevation of the trap and a portion of the hydraulic main; Fig. 2, a front elevation thereof; Fig. 3,'a vertical section thereof on the line 3 3 of Fig. 2, and Fig. 4 a plan or top view of the trap.

The drawings show a hydraulic main A with a nanged casing B secured thereto, constituting a tar-trap or valve-chamber. y The main and chamber communicate through a comparatively-large opening O in their division wall or partition below the normal level of the liquid therein and through a smaller opening or air-hole D above saidv level, thus` equalizing the pressure in the main and valvechamber and permitting a free flow from one IOO to the other. An overflow-pipe E passes vertically into this valve chamber through a gland or packing in its bottom, so as to permit it to move freely endwise therein. Its lower end may dip into an ordinary water seal or trap. The pressure in the main will cause tarry matters and other liquids accumulated therein to pass therefrom through the opening C into the valve-chamber and to overflow through the pipe E into a suitable receptacle, as usual.

In order to raise and lower the overflowpipe, I connect arms or a cross-head F, secured thereon below the valve-chamber with rods G G, preferably movable endwise through guides or bearings g on the outer side of the casing l5. These rods extend some distance above this casing and are connected by a cross-head I-I, carrying a screw-nut I and handwheel I and engaging an upright screw K, fixed on the top of the casing.

An index linger or pointer L on one of the rods G serves to indicate the height of the mouth of the overflow-pipe in the valve-chamber. This height can be varied by turning the nut on the cross-.head Il.

A hand-hole in the top of the casing, closed by a cover M, affords ready access to the valve-chamber.

It will thus be seen that by my improvements I am enabled readily to raise and lower the overflow-pipe by mechanism external to the valve-chamber, (and therefore readily accessible at all times without opening that chamber,) which acts equally on opposite sides thereof and thereby prevents cramping or straining of the pipe or lifting mechanism. I am further thus enabled to use an overliowpipe working through the bottom of the valvechamber only to leave the mouth of the pipe in the valve-chamber entirely unobstructed and to grasp and operate the pipe from below the valve-chamber, thus avoiding the necessity of extending either the pipe or its connections up through the top of the valve-chamber and the consequent necessity of providing two smiling-boxes in the casing for the pipe to work through, instead of one, as under my organization.

Having thus fully described the construction, organization, and operation of my improved tar-trap for hydraulic mains for gasworks, what I claim therein as new and as of my own invention is-- l. The combination, substantially as set forth, of the trap or chamber, the overflowpipe having an unobstructed mouth, bore and outlet vertically adjustable endwise through a gland or packing in the bottom of the chamber, and means for vertically adjusting the pipe attached to its exterior below the chamber and above the outlet end of the pipe.

2. The combination of the trap or valvechamber; the overflow-pipe movable vertically endwise through the gland or packing in the bottom thereof and terminating therein with its mouth unobstructed; the adjustingrods secured to the exterior of the overflowpipe above its discharge end and below and outside of the valve-chamber, and means, substantially such as described, also outside the valve-chamber, for moving the rods, the combination being and operating substantially as and for the purpose set forth.

3. The combination of the ta-p or valvechamber 5 the overflow pipe extendin through the bottom thereof; the cross-head on the pipe; the parallel adjusting-rods connected with the cross -head and passing through guides or bearings on the valve-chamber casing; the upper cross-head connecting the rods above this casing; its screw-nut, and the screw-shaft fixed on the casing, substantially as set forth.

4. The combination of the hydraulic main; the trap or valve-chamber; their aperturcd or perforated dividing partition or wall; the overflow-pipe movable endwise through the gland or packing in the bottom of the valvechamber and terminating therein with its mouth unobstructed; the adjusting-rods secured to the over-flow-pipe below and outside of the valve-chamber, and means, substantially suoli as described, also outside the valve-chamber, for simultaneously moving both rods endwise, correspondingly to adjust the overflow-pipe, the combination being and operating substantially as and for the purpose set forth.

5. The combination of the hydraulic main; the trap or valve-chamber; their aperturcd or perforated dividing-wall or partition; the overflow-pipe movable endwise through the gland or packing in the bottom of the valvechamber; guides on the valve-chamber casing; rods, movable endwise therethrough, connected with the overflow-pipe, below and outside of this casing; a cross-head uniting these rods above the casing; a screw-nut in the cross-head, and a screw on the casing in which the nut works, the combination being and operating substantially as and for the purpose set forth.

In testimony whereof I have hereunto subscribed my name.

CHARLES L. ROWLAND.

Vtfitnesses:

FRANK S. OBER, FRED W. MITCHELL.

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